Experimental investigation of dissipative solitons and other self-organised patterns in dielectric barrier discharge systems

介质阻挡放电系统中耗散孤子和其他自组织模式的实验研究

• 批准号: 74851783
• 负责人: Professor Dr. Lars Stollenwerk
• 金额: --
• 依托单位: Institut für Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/74851783?language=en
• 关键词: Experimental; investigation; dissipative; solitons; other

The understanding of self-organised patterns in nonlinear dissipative systems is one of the great challenges in recent natural sciences. Especially the appearance of well localised, solitary structures with particle like behaviour is a common feature of many physical, chemical and biological systems. These structures are known as dissipative solitons. In this project dissipative solitons appearing in a planar dielectric barrier discharge system in the form of current filaments will be investigated. The scheduled tasks comprise investigations of the filament dynamic, e.g. filament movement, the filament stability, especially during collision processes, and generation and annihilation of filaments. Also the bifurcations between regimes with different filament behaviour shall be addressed. Thereby the point of view of nonlinear dynamics and pattern formation as well as the needs of plasma physics are kept in mind. Hence, an understanding on the level of macroscopic, very common reasoning as well as on the level of plasma physical models allowing quantitative comparison of experimental and theoretical data is aspired. Therefore, beside the traditional observation of the emitted light of filaments with high speed cameras, a measurement system for surface charges on the dielectric barriers will be improved in sensitivity, spatial, and temporal resolution. For the data interpretation both imaging techniques as well as statistical data analysis methods will be used. The work in this project gives a further insight into the mechanisms of self-organised patterns in weakly ionised low temperature plasmas in particular and contributes to the understanding of self-organisation in dissipative systems in general.

对非线性耗散系统中自组织模式的理解是近年来自然科学的重大挑战之一。特别是具有粒子状行为的良好局部化的孤立结构的出现是许多物理、化学和生物系统的共同特征。这些结构被称为耗散孤子。在本计画中，我们将研究平面介质阻挡放电系统中以电流细丝形式出现的耗散孤子。预定的任务包括对细丝动态的研究，例如细丝运动、细丝稳定性（特别是在碰撞过程期间）以及细丝的产生和湮灭。此外，应解决具有不同灯丝行为的制度之间的分歧。因此，非线性动力学和图案的形成以及等离子体物理的需要的观点被牢记。因此，在宏观的水平上的理解，非常常见的推理，以及等离子体物理模型的水平上，允许定量比较的实验和理论数据的渴望。因此，除了传统的观察灯丝的发射光与高速相机，表面电荷的测量系统上的电介质屏障将提高灵敏度，空间和时间分辨率。对于数据解释，将使用成像技术以及统计数据分析方法。在这个项目中的工作提供了一个更深入的了解在弱电离的低温等离子体中的自组织模式的机制，特别是有助于一般耗散系统中的自组织的理解。